He has already served seven years behind bars, mostly in Siberia, now he's been given another six. An opponent of Russian Prime Minister Vladimir Putin, former oil industry oligarch Mikhail Khodorkovsky (pictured) was found guilty December 27th of theft and money laundering at the end of a second trial. Mediapart editor François Bonnet, a former Moscow correspondent, analyses this defining moment for the future of democratic change in Russia amid a power battle between hardline Putin and reformist President Dmitry Medvedev.